Originations of interest-only mortgages declined in the first quarter of 2018 among a group of prominent IO lenders, according to a new ranking and analysis by Inside Nonconforming Markets. The 15 lenders originated an estimated $4.17 billion of IOs in the first quarter of 2018, down 24.9 percent from the previous quarter and down 17.4 percent from the first quarter of 2017. The drop in IO production was worse than the decline in total originations ... [Includes one data chart]